Completely filled or half-filled configurations give extra stability. Why? 

The following are some statements about hybridisation i) Pure orbitals of same atom of an element will participate. ii) The number of hybrid orbitals formed is twice the number of pure orbitals that participate in hybridisation. iii) Completely filled (or) half-filled (or) vacant orbitals may participate in this process. The correct combination is

Assertion (A) Atoms with completely filled and half-filled subshells are stable. Reason (R ) Completely filled and half filled subshells have symmetrical distribution of electrons and have maximum exchange energy. The correct answers is

Write completely the electronic configurations of K and Rb.

Number of completely filled orbitals in xenon atom (Xe) is

(A): The second ionisation energy of 'O' is greater than that of second ionisation energy of 'N' (R): The half filled p-orbitals cause greater stability for an atom. The correct answer is

Which atom with respect to electronic configuration has more stability?

Complete the electronic configuration of the following elements.

When 4f level is completely filled with electrons, the next electron will enter into a subshell whose (n+1) is equal to -